every piece of law enforcement equipment you can imagine that you see at any situation, law enforcement situation on the streets in boston we're seeing here. units from all over the area. we've seen police departments from lincoln and cambridge, and police who had unifier down this morning. tremendous presence. >> eric: can you give us a sense of the size of the perimeter that we're look at right now? there are a lot of people inside that perimeter that are frankly locked down as well. >> you know, initially we were being told it was 15 to 20 blocks early this morning. clearly it is much, much larger than that. it's hard to say because we were at the one edge of it and we were pushed out to this edge. so it would be impossible for me to say how far it goes in the other direction. this is literally miles that we're looking at here that are being lined with officers in every direction. we've seen the k-9 units drive past. we haven't seen any of the dogs out in this area at this point in time, but we've seen the officers staging and blocking off and the motorcycle, the state police officer